Flexible supercapacitor electrodes based on modified binary metal phosphites on three dimensional graphene sponge

Erçarıkcı E., Topçu E., Dağcı Kıranşan K.

JOURNAL OF ALLOYS AND COMPOUNDS, cilt.930, 2023 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 930
  • Basım Tarihi: 2023
  • Doi Numarası: 10.1016/j.jallcom.2022.167305
  • Dergi Adı: JOURNAL OF ALLOYS AND COMPOUNDS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Chemical Abstracts Core, Communication Abstracts, INSPEC, Metadex, Public Affairs Index, Civil Engineering Abstracts
  • Anahtar Kelimeler: Graphene sponge material, Iron phosphite, Zinc phosphite, Cobalt phosphite, Asymmetric supercapacitors, HIGH-PERFORMANCE, ENERGY-STORAGE, CARBON NANOTUBES, ELECTROCHEMICAL PERFORMANCE, ASYMMETRIC SUPERCAPACITOR, HYBRID, OXIDE, NANOSTRUCTURES, FABRICATION, BINDER
  • Atatürk Üniversitesi Adresli: Evet

Özet

In this paper, two flexible graphene-based materials were prepared by electrochemically depositing FeCoP and FeZnP on graphene sponges (GS) as self-standing electrodes for high-performance electrochemical capacitors. The structural and morphological properties of FeCoP/GS and FeZnP/GS electrodes were char-acterized using different spectroscopic techniques. As a result, the FeCoP/GS and FeZnP/GS electrodes de-monstrated a high specific capacitance of 2100 and 1100 F/g at 1.0 A/g, great cycling stability after 10,000 cycles maintaining 80 % and 74 % of its initial capacitance, respectively, which showed better performance than GS electrode. Moreover, two asymmetric supercapacitors were fabricated with FeCoP/GS and FeZnP/GS electrodes and GS; FeCoP/GS//GS and FeZnP/GS//GS circuits displayed a specific capacitance of 1100 and 780 F/g at 1.0 A/g and an outstanding energy density of 185 and 98 Wh/kg at a high power density of 5.6 and 3.8 kW/kg, respectively. Therefore, the as-fabricated electrodes hold great potential in the field of energy storage.(c) 2022 Published by Elsevier B.V.